livingston



(No Model.) 2 Sheets-Sheet 1. J. LIVINGSTON.

ROLLER MILL.

Patented June 26, 1883.

(N0 Model.)

2'Sheets--Sheet 2.

Patented June 26, 1883..

I UNITED STATES PATENT OFFICE,

JOHN LIVINGSTON, OF DAYTON, OHIO, ASSIGNOR TO STOUT, MILLS 8:

TEMPLE, OF SAME PLACE.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 280,195, dated June 26, 1883,

Application filed March 26, 1883. (No model.)

To an whom it may concern: 1

Be it known that 1, JOHN LIVINGSTON, a. citizen of the United States, residing at Dayton, in the county of. Montgomery and State nying drawings, making a part of this specification.

My invention relates to that class of rollermills for making flour known as gradual-re duction mills, in which the grain or middlings is fed from a hopper to one or more pairs of differentially -running grinding or crushing rolls, usually having a corrugated dress and it is an improvement or modification of the construction contained in my roller-mill for which, on the 29th day of May, 1882, I filed an application for Letters Patent in the United States Patent Office. In said former application the swinging roll-supports and the gate mechanism were operated simultaneously by the movement of a single lever keyed upon combination of the parts, as will be hereinafter set forth and specifically claimed;

In the accompanying drawings, Figure 1, Sheet 1., is a sectional view, in side elevation, through the upper part and hopper of the machine, showing so much thereof as is neces sary to illustrate my present invention. Fig. 2, Sheet 1, is a sectional plan view, through the line a: x of Fig. 1, of the hopper-bottom. Fig. 3, Sheet 1, is an enlarged plan view, with portions broken away, of the head of one of the swinging roll-arms and spring-casing ap plied thereto. Fig.4, Sheet 2, is an enlarged detailed view, in rear'elevation, of a portion of the through-shaft and its encompassingsleeve, together with the operating -levers.

Fig. 5, Sheet 2, is an enlarged front view of lever and connections.

The same letters of reference-are used to indicate like parts in all the figures.

Without going into a description of the details of the whole machine, which is given in my former application above referred to, and

' the lower part of the outer or gate-operating to which reference is here made, I would thus describe my present invention:

A is the hopper of the machine, having a raised bottom, B, sloping each way from the center, with dischargeoutlets for the grain on each side and extending the entire width of the hopper. These outlets are opened and closed to admit, regulate, or cut off the flow of grain by means of horizontally-sliding gates C, which are simultaneously operated by a superimposed horizontally-sliding frame or spider, a, hung upon a central guide-rod, D, and provided with pins confined in oblique slots b in the gates, as shown. Running under the hopper from side to side, and suitably journaled in the frame-work, is a through-shaft, E, capable of oscillation by means of a lever, F, keyed or fastened near its outer end on one side of the machine. Upon this through-shaft, under the hopper, is journaled a sleeve, G, so

as to be capable of oscillation independent of the shaft E, and extending from and integral with said sleeve, if desired, is an arm, H, which extends out and under the shaft E, as seen in Fig. 4, Sheet 2.

Pivoted loosely upon the outer end of the shaft E, and sideby side with the lever F, is

is a second hand lever, I, whose lower end is bolted or otherwise securely attached to the outer end of the arm II in such manner that the swinging of the lever I will cause the oscillation of the sleeve G, as will be readily understood. In addition to its attachment to the lever I, the sleeve G is held from sliding upen the shaft E by means of a collar, .I, bearing against its outer end, and secured to said shaft by a set-screw, 0. Upon the sleeve G is a screw-pitched quadrant or wing, K, whose outer edge or periphery is confined between lugs (Z on the under side of the sliding frame or spider a.

From the above construction it will be readily seen that by turning the lever Ithe sleeve ICO G will be oscillated, the spider a caused to slide on its rod by means of the quadrantwing, and the gates simultaneously operated for any purpose required, whether to open, close, or adjust them, and this without the necessity of moving the lever ,F or oscillating the shaft E.

As in my former application, to which reference has been made, the shaft E has on each side of the machine double diametrically-opposite cams or eccentrics L, upon which are loosely fitted the eyes of the inner ends of the rods N, extending to and operating the swinging roll supports or arms M. These rods N extend out through apertures 1n the heads of the roll-supporting arms M, and are secured thereto in the following manner: Over each head is fitted a housing-cap, 0, Fig. 3, Sheet 1, opened on its under side, and containing a coiled spring, 0, which is confined between the outer side of the head and the outer end of the housing, which, on its inner side, is provided with a retaining-boss, f, as shown. The rods N likewise pass through the ends of the housing 0. The inner head of each housing has tapped into it a female nut, g, bearing against the inner side of the head, and through which the rod N loosely passes, and just on the inner side of the female nut 9, upon the threaded end of the rod N, is a jam-nut or wheel, 71. Upon the threaded outer end of each of the rods N is an adjusting nut or wheel,

From this description it will be readily seen that by means of the female nut g and wheel '0 the adjustment of the roll-supporting arms M and the initial tension of the springs 0 can be regulated to a nicety for the purpose of adjust ing the rolls of each pair to each other and regulating their yielding'point.

The above construction of spring-housing which I have given is the invention of Henry J. Gilbert, and will form the subject of an application to be made and filed simultaneously with this and for the benefit of our assignees, Messrs. STOUT, MILLs 8t TEMPLE. Y

While Iprefer the employment of the above"- described spring-connections, yet it is evident that my lever-operating mechanism could be employed with other forms of spring-connec tions, and consequently I do not propose to limit myself to the construction of such springconnections nor their arrangement.

I have not shown the manner of mounting the arms M, as this is fully described in my former application, together with the other well-known parts of the machine.

From the description I have given it will be seen that by operating the lever Fthe arms M, carrying the outer rolls, will be thrown apart or brought together, as desired, so as to spread the rolls apart or bring them into working position, and by moving the lover I the gates will be operated, or owing to the fact that the handles of both levers may be grasped and operated at once to spread the rolls apart or cut off the flow of grain, or vice versa, by a single movement.

Having thus fully described my invention, I claim- 1. In a roller grinding-mill, the combination, with the co-operating grinding-rollers, the upright pivoted j ournal-arms, the rolleradjusting shafts or rods, adjustable spring-con nections, hopper-gate mechanism, a throughshaft, and sleeve journalcd thereon, of two independent levers and connecting mechanism, whereby upon operating one of said levers the rolls can be thrown apart, or vice versa, and upon operating the other of said levers the hopper-gates will be operated, and whereby both of said levers can be grasped and operated simultaneously, substantially as described.

2. In a roller-mill, the combination, with the connecting-rods and an oscillating throughshaft provided with a lever for operating the outer roll supports or journals, of a sleeve journaled upon said through-shaft, and provided with a quadrant-wing, the hoppengates,

the sliding frame, and a lever pivoted upon the through-shaft, whereby the hopper-gate mechanism can be operated without oscillatingthe through-shaft, and vice versa, substantially as described.

JOHN LIVINGSTON. Vitnesses:

QUINCY ConwIN, J osnrn A. XVORTMAN. 

